The depths below the city of Sharn contain many twisting tunnels and complex mechanisms to regulate the flows of water and sewage from the heights to the depths of the city. The path to find the lost Dorasharn forge and the mysterious first schema had led them to this location, where a hidden door led to forgotten paths.

Unfortunately, the group had been less than discrete in its enquiries at the Rat Market, and Shifters aligned with the Lord of Blades set an ambush at this sewer valve junction. A messy fight, dodging sewage flows and struggles to keep their balance began.